Grinding noise
 

Hi,

I have a 1999 colt 2.5 diesel (4x2). When I drive there is a very distinct grinding noise. The noise persist when I take it out of gear or engage the clutch while driving. When stationary and the engine is revved there is no noise. When driving and going over a bump the noise comes and goes and then persist again. Also when turning the steering while driving makes no difference. Any idea on what it can be?